Tangent



eHime 18, 1935.

J. c. DIEHL 2,005,025

TANGENT Fiied Aug. 25, 1935 ATTORNEYS.

TANGEN'r Johny yDieliLErie, Pa., assignor to. American v I- Meter Company, New York, -N. Y., a corpora- Patenred June 18, y1935 tion of Delaware Applicatign August-25.1933, serial Nassasos f s claims.

yMost fluid actuated gas meters are provided with a tangent which takes the movement from the diaphragms and transmits it. to the controlling shaft. It is desirable withk these tangentsz-to have 5 them adjustable so that the throw ofthe tangent,

or crank, involved in its structure may bemade. greater, or less, `toadjust the throw lto variations in the diaphragms.. It is also desirable to have Wthetangent adjustable rotatively on the shaft 1o',`-

so that vthe timing of the valve, or other mechanism controlled bythe tangent may be adjusted with relation to the action of thev diaphragms. The present invention is designed to simplify the tangent structure and to provide a more certain and denite adjustment and one in which the adjustment may be conveniently made. Features and details of the invention will appear from the specification and claims.

A preferred exemplication of the invention is illustrated in the accompanying drawing as followszn Fig. 1 is a vertical section on the lines I-I in Fig. 2.

Fig. 2 a section on the lines22 in Fig. 1.

Fig. 3 a perspective view of the tangent.

Fig. 4 a perspective view of the end of the controlling shaft.

Fig. 5 a perspective view of the cross arm.

Fig. 6 a perspective View of the cross head.

I marks the case of the gas meter, 2 the flexible part of the diaphragm, 3 the disc on the diaphragm, 4 the cover forming with the diaphragm vone of the meter chambers, 5 a'bracket on the disc, E a link pivotally mounted with the bracket 5 and extending to a tangent post 1. otal connection between the link 6 and the tangent post is provided with a bushing 8. In the exemplication of the meter shown there are two of the diaphragme and two links 6 extending to the same tangent post.

The post is. mounted on a cross head 9 and the cross head is mounted on a tangent arm II). The tangent arm is rotatively mounted on a controlling shaft II. The controlling shaft II is journaled in a fitting I2 secured in the case and extends up into the valve chamber and is provided with a crank I3 which operates the meter valve I4. A worm gear I5 is also driven by a worm (not shown) on the control shaft II and this worm gear drives a shaft I6 which in turn drives a dial Il.

The tangent arm has flattened portions I8 and the cross head has an elongated opening I9 by means of which it is slidingly mounted on the tangent arm but locked against rotation there- The piv- (c1. 'z3- 1) on. The tangent arm `is also screwthreaded anut 20 is provided engaging .lthejcross head. crossl arm 2| `is xedly mounted von the shaft jII.' This cross arm has an Aelongated opening; 2 vs rhi'ch"` engages anend"23 on the bottom of they cont l shaft, the end '23 having a shape' corresponding to the elongated'opening 22., A nut 24 is screwedr` on tothe bottom ofthe control's'haft'clampi gi the cross arm in place. j

Adjusting screws, 2,5 entendl through 'screwf threaded openings 26 in the cross head 'and extend intocone-shaped sockets 21 in the cross arm, the ends of the screws being pointed at 25a so as to make a point engagement between the bottom of the socket and the end of the screw.

These screws are provided with slots 28 by means of which they may be operatedv through the action of an ordinary screw driver 29.

From this construction it will readily be seen 1 that by loosening `the screws 25 and tightening the nut 20 thethrow of the tangent may be decreased and by a reversal of this operation the throw may be increased. 'I'he adjustment may be positively locked by the counteraction between the nutv 20 and the screws 25. 'Ihe control shaft may be adjusted rotatively by the 'rocking of the cross arm 2| at any adjustment of the tangent.

This is accomplished by loosening one of the.

screws 25 and'tightening the opposite screw 25. In this way the cross arm may be adjusted to rotatively adjust the control shaft in either direction depending on which screw 25 is loosened and which is tightened. The nut` 20 may be operated by an ordinary socket wrench, the

screws 25 by an ordinary screw driver, and these o the tangent arm; a tangent post on the crossv head; and a screw connection between the head and the cross arm adjusting the tangent arm.

2. In a tangent, the combination of a shaft; a cross arm xed on the shaft, said cross arm extending from opposite sides of the shaft; a tangent arm rotatively mounted on the shaft; a cross head on the tangent arm and extending to opposite sides of the tangent arm; a tangent post.

e justing'the tangent arm.

4:. In a tangent, the combination of a shaft; va cross arm fixed on the shaft, said cross arm extending from opposite sides of the shaft; a tangent arm rotatively mounted on the shaft; a cross head adjustably mounted on the tangent arm and adjustable thereon toward and from the shaft; a tangent post on the cross head; and screw connections extending between the cross head and the cross arm at kopposite sides of the tangent arm adjusting the tangent arm.

5. In a tangent, the combination `of a shaft; a cross arm xed on the shaft; a tangent arm ro.- tatively mounted on the shaft, said tangent arm being KVscrewfthreaded; a cross head slidingiy mounted on the tangent arm; a tangent lpost on the cross head; a screw connection between the head and cross arm; and a nut on the tangent arm engaging the cross head. v

.6. In a tangent, the combination of a shaft; a

cross arm fixed on the shaft and extending to opposite sides thereof; a tangent arm rotatively mounted on the shaft, said tangent arm being screw-threaded; a cross head on the tangent arm Y being screw-threaded and fiattened; a cross head having an elongated opening through which the tangent arm extends, the cross head being slidingly mounted on the tangent arm; a tangent post on the cross head; a* screw connection between the head and the cross arm; and a nut on the f tangent arm engaging the cross head.

` 8. In a tangent, the combination of a shaft; a cross arm fixed on the shaft and extending to oppositesides of the shaft; a tangent arm'rrotatively mounted on the shaft, said tangent arm being screw-threaded; a cross head slidingly mounted on the tangent arm, said cross head having screwthreaded openings thereinat opposite sides of the tangent arm; a tangent post on the cross head; screws arranged inthe screwthreaded openings in the cross head and engaging the cross arm; and a nut onv the tangent arm engaging the cross head. A

, JOHN C.. DIEHL. 

